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This paper presents a slotted-rectangular patch antenna with proximity-coupled feed operated at dual band of millimeter-wave (mmV) frequencies, 28GHz and 38GHz. The antenna was built in multilayer substrate construct by 10-layers Low temperature Co-fiber Ceramic (LTCC) with 5 mils thickness each. The slotted-patch and thick substrate are configured to enhance the bandwidth and obtain a good result...
A Cuboid Dielectric Resonator Antenna fed by microstrip feed line is studied. The dielectric resonator of the antenna is made by a material with high dielectric constant ∊r=30. The impedance matching of dielectric resonator can be improved by using a # slot in the ground. In additional, a two elements array is used to enhance the performance of the antenna. This proposed antenna is suitable for long-term...
A unique hook-shaped conformal metal strip has been used to excite a cylindrical multilayer dielectric resonator antenna (DRA). By using the proposed unique feed and multi dielectric layers, a broadband circular polarization have been achieved over a bandwidth of ∼9.8% in conjunction with an impedance-matching bandwidth of ∼12.8% at same frequency range. The DRA has been successfully designed and...
This study presents design and analysis of a wideband circularly polarized (CP) cylindrical hollow shaped dielectric resonator antenna (DRA) which has been excited with a roman three (m) shaped feed. The proposed feed has been made-up of five metallic strips, which have been optimized to generate a wideband circular polarization. The proposed antenna offers circular polarization over a bandwidth of...
We present our latest advances in antenna miniaturization using dielectric resonators and design of sparse arrays for ultra-wide band applications without the need for non-linear numerical optimization. We experimentally demonstrate a dual-feed, low-profile, stacked dielectric resonator antenna for the C band with wide bandwidth and high gain, as well as a bio-inspired sparse array design for ultra-wide...
In this paper, a hybrid Z-shaped dielectric resonator antenna (DRA) design is proposed. Conformai strip feeding is utilized to feed the antenna. It is observed that by use of two different DRA materials, Q-factor can be reduced and in turn ultrawide bandwidth (UWB) can be achieved. A rigorous parametric study is carried out to optimize the bandwidth of proposed antenna while maintaining its compactness...
A broadband circularly polarized (CP) dielectric resonator antenna (DRA) is investigated in this paper. There are four identical dielectric resonators (DRs) arranged into a cross configuration and excited by a cross slot. A significant enhancement in the axial ratio (AR) bandwidth is found due to their inherited sequential structures, with the antenna has the input impedance bandwidth of 31.2% from...
In this paper circularly Polarized Dielectric Resonator Antenna for the Satellite frequency applications has been designed. With proper design the proposed Cylindrical DRA fed by centered V-shaped slot; is showing characteristics of Circular Polarization in the desired band. Two orthogonal arms of symmetrically centered V-shaped slot having same dimension excite the TM01δ modes at 9.75GHz as well...
Digit-like periodic structures have demonstrated overtly multiple resonances that almost disqualify them as good candidates for microwave circuits, since it is rather difficult to identify their resonance at the dominant mode practically. In this work, an alternative solution to mitigate these spurious resonances is investigated. The dielectric loading effect is examined to determine its efficacy...
A two-layer hemispherical DRA coupled to the circular waveguide through an annular slot is proposed. The configuration is easy to realize and avoids the need of additional coupling or matching elements to couple to the DRA. Good return loss characteristics with enhanced bandwidth is obtained. In addition, stable radiation pattern with low cross-pol is obtained in the impedance bandwidth.
A novel approach to improve axial ratio (AR) and axial ratio bandwidth (ARB) of circular polarized (CP) dielectric resonator antennas (DRA) excited with dual-point feeds is presented. It is applicable to different CP DRA cross sections excited though two inputs with a 90-degree angular separation. First, excitation of the DRA ports that substantially improves AR in the broadside direction at the CP...
In this paper, the design of aperture-couplet rectangular dielectric resonator antennas arrays is illustrated. The effect of slot feed on the dielectric resonator antenna (DRA) and the effect of the spacing between array elements is observed. This paperwork can be useful for WLAN applications with the operating frequency 5.8 GHz.
The design of a millimeter-wave (mm-wave) dielectric resonator (DR) multiple-input-multiple-output (MIMO) antenna system is presented. The MIMO structure consists of four arrays each radiating in one of four opposite directions. Each array is composed of four cylindrical DR antenna elements (cDRAs) operating at 30 GHz with a fractional bandwidth of at least 6.7%. The elements are fed via slot coupling...
A new and physically realizable feed employing a dielectric resonator (DR) has been conceived and demonstrated for ${\rm HEM}_{12\delta}$ mode in a cylindrical dielectric resonator antenna (CDRA). This indeed enables in realizing an improved version of dual-band dual-mode dielectric resonator antenna (DRA) with attractive broadside radiation along with wide bandwidth characteristics. It comprises...
In this paper, an annular shape microstrip feed is presented, which has been used to excite a hybrid mode in ring dielectric resonator antenna. The proposed feed for ring dielectric resonator antenna has been achieved 10 dB impedance bandwidth of 71.1% at the center frequency of 5.35 GHz. The operating frequency range of the antenna is 3.2GHz–7.23GHz. The radiation patterns are consistent throughout...
A novel and petite edge fed dielectric resonator antenna (DRA) is achieved by cutting the right portion of rhombic DRA with a rhombic slot at the centre and also with partial ground plane is presented for wireless communication applications. A strip line is used as feeding structure for the dielectric resonator. Parametric analysis on the antenna is performed using HFSS solver by varying the height...
A Cylindrical Dielectric Resonator antenna is presented with diversity in probe feed locations. The Cylindrical Dielectric resonator Antenna (CDRA) introduced with conical air gap is excited with coaxial probe. The placement of probe conformal to CDRA with and without the help of a metal strip is investigated. HEM11δ mode is excited for both the feedings and resonances occur at 5.1 GHz to be suitable...
In this paper, a circularly polarized ring shaped dielectric resonator antenna has been presented. The proposed antenna consists of a ring shape dielectric resonator (DR) and cross-slot feed, which offers 10-dB impedance bandwidth of 48.81% at centre frequency 4.63 GHz and 3-dB axial ratio bandwidth of 6.51% (θ = 00, Φ = 00) at centre frequency 5.37 GHz. The proposed antenna shows average peak gain...
A millimeter-wave (mm-wave) dielectric resonator (DR) based, multiple-input-multiple-output (MIMO) linear antenna array is presented. The array elements are cylindrical DR antennas (cDRAs) operating at 30 GHz with a bandwidth of at least 2 GHz. The MIMO antenna system consists of two, four-element arrays, each with a fixed beam direction which is electronically tilted to provide low field correlation...
In this paper, a triple-band pentagonal dielectric resonator antenna (DRA) array is presented for X-Band applications. Here, two pentagonal dielectric resonators are used as an array. The DRA array is excited by conformal strip connected to micro strip line which is an effective feed mechanism to obtain triple-band operation. Simulation process was done by using a CST microwave studio.
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